NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1376006064 MD
Verify on CMS → Zachary Appelbaum, MD
Nephrology Physician in New Brunswick, New Jersey.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,569 in Nephrology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
97
Medicare Part D claims · 28 beneficiaries · Nephrology Physician avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Zachary Appelbaum, MD filed 97 Medicare Part D claims in 2023 as a Nephrology Physician in New Brunswick, New Jersey.
- 97
- Part D claims, 2023
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Zachary Appelbaum, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
97 0th percentile higher than 0% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Zachary Appelbaum, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Zachary Appelbaum, MD?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
97 93% vs specialty avg
Specialty distribution in New Jersey
How Nephrology Physician compares to other specialties among New Jersey providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Nephrology Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Zachary Appelbaum, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 125 PATERSON ST STE 5100, New Brunswick, NJ, 08901, with a listed phone of (732) 235-6512. NPI 1376006064 was issued on 04/09/2019.
Medicare Part D records for calendar year 2023 show 97 prescription claims written by this provider, covering 28 Medicare beneficiaries and totaling roughly $16K in drug spend.
Nephrology Physician is a mid-sized specialty nationwide, with 10,569 enrolled providers across 55 states and an average of 1,454 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1376006064 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/09/2019 |
Hospital and facility affiliations
Facilities where Zachary Appelbaum, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Rutgers Health-Rwj Scleroderma Program
New Brunswick, NJ
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
97
Total Claims
$16K
Total Drug Cost
28
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 245
- Total Day Supply
- 7,184
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 74.6 years
- Avg HCC Risk Score
- 2.21
- Gender Split
- 61% female / 39% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Losartan Potassium | 12 |
| Carvedilol | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Zachary Appelbaum, MD fits within the Nephrology Physician landscape nationally.
10,569
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
Zachary Appelbaum, MD's 97 claims are below the specialty average of 1,454.
Nearby Nephrology Physician Providers in New Jersey
Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as Appelbaum.
Dr. Arshia Abbasi
MD
Paramus, NJ
Dr. Khaled Abdel-Kader
M.D.
Freehold, NJ
Dr. Zeinab Abdulrahman
MD
Neptune Twp, NJ
Dr. Mirel Abramovici
M.D.
Englewood, NJ
Dr. Prasad Acharya
M.D.
Hainesport, NJ
Compare Nephrology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the New Jersey medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nephrology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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How to Find a Doctor
Step-by-step guide to choosing a provider
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Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore New Jersey
Frequently Asked Questions
What is Zachary Appelbaum, MD's specialty? ▼
Zachary Appelbaum, MD specializes in Nephrology Physician and practices in New Brunswick, New Jersey. Credentials: MD.
How much does Zachary Appelbaum, MD prescribe under Medicare Part D? ▼
In 2023, Zachary Appelbaum, MD wrote 97 Medicare Part D claims totaling $16K in drug costs for 28 beneficiaries.
Where is Zachary Appelbaum, MD located? ▼
Zachary Appelbaum, MD is located at 125 PATERSON ST STE 5100, New Brunswick, NJ, 08901. Phone: (732) 235-6512.
What is Zachary Appelbaum, MD's NPI number? ▼
Zachary Appelbaum, MD's National Provider Identifier (NPI) is 1376006064, issued on 04/09/2019.
How many Nephrology Physician providers are there in the US? ▼
There are 10,569 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does Zachary Appelbaum, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Zachary Appelbaum, MD's most frequently prescribed drugs include Losartan Potassium, Carvedilol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Zachary Appelbaum, MD accept Medicare? ▼
Zachary Appelbaum, MD appears in CMS Medicare data with 97 Part D claims and 28 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Zachary Appelbaum, MD's credentials? ▼
Zachary Appelbaum, MD's NPI is 1376006064 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.